Warning: Ignoring 'secure' attribute in policy file from http://fpdownload.adobe.com/pub/swz/crossdomain.xml. The 'secure' attribute is only permitted in HTTPS and socket policy files. See http://www.adobe.com/go/strict_policy_files for details.

This warning from comes when by default you are compiling with RSLs externalized. This means that RSLs will be loaded at runtime, they also require crossdomain policy, apparently, Adobe is serving RSLs for both secure and non-secure connections from the same location, thus you are getting this warning.

Loading RSLs into AIR app is a bad thing because it might not always be in the internet enabled location. So, probably use static RSLs instead? You will need to configure that in flex-config.xml